This variable defines the full path of the registry key under which the main product's uninstallation information is stored on the target system, if the current product is configured as an Add-on/upgrade for product on the Product info project page.


You can refer to this variable as <UninstallMainRegPath>. Because it is a registry path, it is typically used as <@<UninstallMainRegPath>\...value name...>. Do not change its value; it has been carefully configured for cross-platform compatibility.

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